Reverse suction inhibiting squeeze bottle discharge nozzle

ABSTRACT

A reverse suction inhibiting squeeze bottle discharge nozzle is secured to the filler neck of an otherwise conventional squeeze bottle. The reverse suction inhibiting squeeze bottle discharge nozzle provides a valve operative within the discharge passage of the nozzle together with an air return venting system and apparatus that cooperate with the valve to provide a vented air flow return into the bottle interior thereby restoring atmospheric pressure to the bottle interior. The venting of the air return venting system and the closure of the valve occur solely when the deformed squeeze bottle is released. As a result, the reverse suctioning of potentially contaminated material discharge back into the squeeze bottle interior is prevented.

CROSS REFERENCE TO RELATED APPLICATION

This application claims the benefit of and priority under 35 U.S.C. 119(e) of U.S. Provisional Patent Application No. 62/474,770 entitled REVERSE SUCTION INHIBITING SQUEEZE BOTTLE DISCHARGE NOZZLE, filed Jun. 5, 2017 in the names of Steve Smith, Arman Semerjian and Christopher H. Froian, the disclosure of which is incorporated herein by reference

FIELD OF THE INVENTION

This invention relates generally to squeeze bottles and particularly to the discharge nozzles utilized in dispensing flowable materials from the squeeze bottle interior.

BACKGROUND OF THE INVENTION

One of the most ubiquitous types of material containers and dispensers used in commerce today is known generally in the art as the “squeeze bottle”. Such containers are utilized for storing, transporting, merchandising and utilizing a virtually endless variety of products and materials ranging from industrial products to condiments to medical products and to various lubricants. In most applications of typical squeeze bottle containers, the material is generally viscous and flowable such as pastes, gels, adhesives and viscous liquids.

While squeeze bottles have been provided in a virtually endless variety of sizes, shapes and designs, the typical squeeze bottle container is relatively simple construction and is relatively low in manufacturing costs. In general, squeeze bottles utilize a deformable container or “bottle” having a hollow interior for receiving the flowing material. Such squeeze bottles are preferably formed of a flexible and resilient plastic material or the like. In most instances the bottle includes a filler neck which facilitates filling the bottle with the flowable material. A cap is secured to the filler neck by conventional attachment and supports an elongated, usually tapered, discharge nozzle. The latter defines a material flow passage therethrough. In most squeeze bottle designs, a removable nozzle cap is secured to the outer end of the nozzle to provide an airtight closure when the squeeze bottle is not in rise.

The use of the typical squeeze bottle is also generally simple and straightforward. With the nozzle cap removed, the user tips the squeeze bottle downwardly positioning the end of the discharge nozzle in proximity to the desired area of material deposition. Tho squeeze bottle is then squeezed by the user causing the squeeze bottle to deform inwardly and thereby force a flow of the material outwardly from the squeeze bottle interior, through the passage in the discharge nozzle and beyond to the surface for deposition. Once the desired quantity of material has been discharged from the squeeze bottle and deposited upon the desired surface, the user then releases the squeeze bottle allowing the bottle to return to its original shape. In the event that an additional quantity of material is to be discharged, the user may employ repeated cycles of squeezing and releasing the squeeze bottle. The purpose of releasing the squeeze bottle is to facilitate its return to its relaxed shape and to suction air into the bottle interior as it returns to its relaxed shape.

The characteristic by which such typical squeeze bottles suction air into the bottle interior between discharges of material is the focus of the present invention. Unfortunately, this suction of air into the squeeze bottle also tends to draw a portion of the discharged flowable material from the surface deposition back into the bottle interior along with the air being drawn into the bottle interior moving from the nozzle tip, through the nozzle discharge passage, and back into the squeeze bottle interior. While in certain applications of squeeze bottles this reverse suctioning of the flowable material from the surface deposition back into the bottle contents is of little consequence. However, in many squeeze bottle applications it presents a serious problem of contamination of the squeeze bottle interior and the flowable material therein. In many applications the surface upon which the flowable material is deposited is a source of potential contamination of the flowable material. In some applications such as industrial and commercial use, this contamination may result in degrading the characteristics of the material. Examples of such industrial use are found in application of lubricants, adhesives or sealants. In other applications to which the present invention particularly relates, these squeeze bottles are employed in the demanding environment of medical technology and patient care. In medical technology applications of squeeze bottles, the typical desire of the medical practitioner is to be able to utilize a squeeze bottle to deposit a quantity of the flowable material onto a patient's skin surface, or the like, and following such use to be able to reuse the squeeze bottle upon a succession of future patients.

Unfortunately, the typical squeeze bottles presently employed by medical practitioners render this repeated use impractical and potentially hazardous to successive patients upon whom the flowable material is administered. The above-described suctioning of contaminated, or potentially contaminated, material from a patient's skin back into the remainder of the flowable material, housed in the squeeze bottle raises the likelihood of contaminating the flowable material applied to subsequent patients. Recognizing the substantial risk to patients created by repeated use of a squeeze bottle on a plurality of patients, practitioners in the medical arts have seeking to maintain best practices, tend to discard the squeeze bottle after use. This may render the squeeze bottle a “single use” container. This, of course, has been found to be extremely wasteful and cost prohibitive. While practitioners using squeeze bottles and manufacturers of squeeze bottle dispensed materials have sought to relieve this wasteful process through reducing the squeeze bottle size and in some instances providing small squeeze bottles specifically intended for single use, the community of medical practitioners has overwhelmingly rejected this proposed solution.

The failure of squeeze bottle manufacturers to overcome this problem, and meet the practical needs of medical practitioners as well as the similar needs of various industrial and commercial product types that are also subject to unnecessary waste and cost to avoid similar contamination of material through this reverse suction process, has given rise to a significant and unresolved need in the manufacture, distribution and use of squeeze bottles. As a result, there remains a continuing and unresolved need in the art for a reverse suction inhibiting squeeze bottle discharge nozzle.

SUMMARY OF THE INVENTION

Accordingly, it is a general object of the present invention to provide an improved squeeze bottle container. It is a more particular object of the present invention to provide an improved discharge nozzle for use in squeeze bottles. It is a still more particular object of the present invention to provide an improved discharge nozzle for use upon a squeeze bottle which inhibits reverse suction of the flowable material back into the squeeze bottle interior and thereby prevents contamination of the squeeze bottle contents.

In accordance with the present invention there is provided a reverse suction inhibiting squeeze bottle discharge nozzle secured to the filler neck of an otherwise conventional squeeze bottle. The reverse suction inhibiting squeeze bottle discharge nozzle of the present invention provides a valve operative within the discharge passage of the nozzle together with an air return venting system and apparatus that cooperates with the valve to provide a vented air flow return into the bottle interior thereby restoring atmospheric pressure to the bottle interior. The venting of the air return venting system and the closure of the valve occur solely when the deformed squeeze bottle is released. As a result, the reverse suctioning of potentially contaminated material discharge back into the squeeze bottle interior is prevented.

In further accordance with the present invention there is provided a reverse suction inhibiting squeeze bottle discharge nozzle for use in combination with a squeeze bottle, the squeeze bottle discharge nozzle comprising: an assembly cap, securable to a squeeze bottle in communication with flowable material therein, the assembly cap defining a discharge aperture and a vent aperture; a one way discharge valve supported within the discharge aperture operative to permit material flow outwardly from the assembly cap and to prevent material flow inwardly to the assembly cap; and a vent valve operative to permit air flow into the assembly cap through the vent aperture and to prevent airflow outwardly from the assembly cap through the vent aperture, the discharge valve and the vent valve cooperating to allow flowable material within the assembly cap to be forced outwardly through the discharge valve and to prevent a suction force within the assembly cap from drawing discharge flowable material back into the assembly cap.

From another perspective, the present invention provides a reverse suction inhibiting squeeze bottle discharge nozzle, said squeeze bottle discharge nozzle comprising: a squeeze bottle formed of a resilient material defining a closed interior volume and an open neck; a quantity of flowable material received within the interior volume; an assembly cap, secured to the squeeze bottle in communication with the closed interior volume and the flowable material therein, the assembly cap defining a discharge aperture and a vent aperture; a one way discharge valve supported within the discharge aperture operative to permit material flow outwardly from the assembly cap and to prevent material flow inwardly to the assembly cap; and a vent valve operative to permit air flow into the assembly cap and the closed interior volume through the vent aperture and to prevent airflow and flowable material flow outwardly from the assembly cap through the vent aperture, the discharge valve and the vent valve cooperating to allow flowable material within the closed interior volume and the assembly cap to be forced outwardly through the discharge valve and to prevent a suction force within the closed interior volume and the assembly cap from drawing discharged flowable material back into the assembly cap.

BRIEF DESCRIPTION OF THE DRAWINGS

The features of the present invention, which are believed to be novel, are set forth with particularity in the appended claims. The invention, together with further objects and advantages thereof, may best be understood by reference to the following description taken in conjunction with the accompanying drawings, in the several figures of which like reference numerals identify like elements and in which:

FIG. 1 sets forth a side elevation view of a squeeze bottle utilizing the present invention reverse suction inhibiting discharge nozzle;

FIG. 2 sets forth a top view of a squeeze bottle utilizing the present invention reverse suction inhibiting discharge nozzle;

FIG. 3 sets forth a section view of a squeeze bottle utilizing the present invention reverse suction inhibiting discharge nozzle taken along section lines 3-3 in FIG. 2;

FIG. 4 sets forth an enlarged section view of the present invention reverse suction inhibiting discharge nozzle showing the valve in section;

FIG. 5 sets forth an enlarged section view of the present invention reverse suction inhibiting discharge nozzle having the nozzle closure cap removed;

FIG. 6 sets forth the enlarged section view of the present invention reverse suction inhibiting discharge nozzle set forth in FIG. 4 taken along section lines 6-6 in FIG. 1;

FIG. 7 sets forth a section view of the present invention reverse suction inhibiting discharge nozzle having its nozzle closure cap removed;

FIG. 8 sets forth an enlarged assembly section view of the present invention reverse suction inhibiting discharge nozzle having the nozzle and closure cap removed:

FIG. 9 sets forth a side elevation view of an alternate embodiment of a squeeze bottle utilizing the present invention reverse suction inhibiting discharge nozzle;

FIG. 10 sets forth an end view of an alternate embodiment of a squeeze bottle utilizing the present invention reverse suction inhibiting discharge nozzle;

FIG. 11 sets forth a section view of an alternate embodiment of a squeeze bottle utilizing the present invention reverse suction inhibiting discharge nozzle taken along section lines 11-11 in FIG. 10;

FIG. 12 sets forth a side elevation view of a further alternate embodiment of a squeeze bottle utilizing the present invention reverse suction inhibiting discharge nozzle;

FIG. 13 sets forth an end view of a further alternate embodiment of a squeeze bottle utilizing the present invention reverse suction inhibiting discharge nozzle;

FIG. 14 sets forth a section view of a further alternate embodiment of a squeeze bottle utilizing the present invention reverse suction inhibiting discharge nozzle taken along section lines 14-14 in FIG. 13;

FIG. 15 sets forth a perspective view of the one-way valve utilized in the present invention reverse suction inhibiting discharge nozzle;

FIG. 16 sets forth a perspective view of an alternate embodiment of a squeeze bottle utilizing the present invention reverse suction inhibiting discharge nozzle;

FIG. 17 sets forth assembly section view of an alternate embodiment of the present invention reverse suction inhibiting discharge nozzle;

FIG. 18 sets forth a section view of the alternate embodiment of the present invention reverse suction inhibiting discharge nozzle shown in FIG. 17; and

FIG. 19 sets forth a partial section view of a still further alternate embodiment of the present invention reverse suction inhibiting discharge nozzle.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

By way of overview, the present invention reverse suction inhibiting squeeze bottle discharge nozzle provides a discharge nozzle assembly which is secured to the filler neck of a resilient elastic squeeze bottle formed of a suitable plastic material or the like. The discharge nozzle assembly is configured to be received upon the filler neck of the squeeze bottle by conventional threaded attachment, conventional snap fit attachment or alternatively secured to the neck portion of a squeeze bottle fabricated to receive the discharge nozzle assembly by direct attachment. The discharge nozzle assembly of the present invention utilizes a one-way valve, such as “duckbill valve”, together with an air venting system which allows the suction formed in the squeeze bottle when squeezed and released by the user to simultaneously close the one-way valve and vent return air into the squeeze bottle interior thereby returning the squeeze bottle interior normal atmospheric pressure. By this action, the reverse suction of material back into the squeeze bottle interior normally created by prior art devices is completely avoided. As a result, the squeeze bottle interior and the material contents within the squeeze bottle interior remain protected from contamination which would otherwise result in conventional squeeze bottles as the reverse suction draws potentially contaminated material into the bottle through the nozzle passage. As used herein, the term “squeeze bottle” will be understood to include various types of material containers, including flexible material bottles and “toothpaste-type” containers, typically formed of an elastic or deformable material which is usually squeezed to discharge a flowable material from within the container.

FIG. 1 sets forth a side elevation view of a squeeze bottle constructed in accordance with the present invention and generally referenced by numeral 10. Squeeze bottle 10 includes a generally cylindrical hollow bottle 11 preferably formed of a resilient plastic material, or the like, having a closed bottom 15 and a filler neck 12. Bottle 11 further defines an interior 16 (seen in FIG. 3) within which a quantity of flowable material (not shown) is received.

A discharge nozzle assembly generally referenced by numeral 20 includes an assembly cap 21 which is received upon and secured to filler neck 12 by conventional attachment. As is better seen in FIG. 3, assembly cap 21 is secured to filler neck 12 by a conventional threaded attachment. It will be noted however that alternatively a conventional snap fit attachment such as that, set forth in FIG. 11 below, may be utilized without departing from the spirit and scope of the present invention. Additionally, and as is set forth in FIG. 14 below, the present invention squeeze bottle discharge nozzle may be directly secured to an extension of the squeeze bottle its self (for example, valve neck 52).

Returning to FIG. 1, discharge nozzle assembly 20 further includes a nozzle cap 23 which is, secured to valve neck 22 by a conventional snap fit attachment. In the typical use of squeeze bottle 10 described below in greater detail, a quantity of flowable material such as a gel or viscous liquid or alternatively a paste material is supported within interior 16 (seen in FIG. 3). In further occurrence with this typical use, nozzle cap 23 is removed and squeeze bottle 10 is positioned above a surface upon which a portion of the contents within squeeze bottle 10 are to be deposited. Bottle 11 is then squeezed to force a portion of the material contents within bottle 11 outwardly through the discharge nozzle. Once the material transfer is completed, nozzle cap 23 is replaced and squeeze bottle 10 may be put aside for future use. In accordance with an important aspect of the present invention described below in greater detail, the structure of discharge nozzle assembly 20 prevents reverse suction of deposited material back into the interior of squeeze bottle 10 thereby preventing contamination of the remaining contents within squeeze bottle 10.

FIG. 2 sets forth a top view of squeeze bottle 10. As described above squeeze bottle 10 includes a resilient bottle 11 upon which a discharge nozzle assembly 20 is supported. As is also described above discharge nozzle assembly 20 includes an assembly cap 21 supporting a valve neck 22 which, in turn, receives and supports a removable nozzle cap 23.

FIG. 3 sets forth a section view of squeeze bottle 10 taken along section lines 3-3 in FIG. 2. As described above, squeeze bottle 10 includes a resilient cylindrical bottle 11 having a closed bottom 15 and an interior 16. As is also described above, squeeze bottle 10 includes a filler neck 12 upon which assembly cap 21 of nozzle assembly 20 is secured. In the embodiment shown for squeeze bottle 10, the attachment of assembly cap 21 to filler neck 12 is provided by a plurality of cooperating threads. It will be recalled that alternative means of attachment between filler neck 12 and assembly cap 21, such as snap fit or integrally formed, may be utilized without departing from the spirit and scope of the present invention.

FIG. 4 sets forth a section view of assembly cap 21 further supports a valve neck 22 extending therefrom. Valve neck 22 further defines a plurality of vent apertures 25 and a center aperture 24. In addition, valve neck 22 further defines a neck extension 27. Nozzle cap 23 is received upon neck extension 27 in a snap fit attachment. Nozzle cap 23 further defines a nozzle seat 26 which forms a tapered receptacle. Discharge nozzle assembly 20 further includes a discharge nozzle generally referenced by numeral 32 which is formed of a soft flexible resilient material such as silicone or the like. Discharge nozzle 32 includes a one-way valve 30 which extends through center discharge aperture 24 of cap 21 and defines a valve structure generally known in the art as a “duckbill” valve. Discharge nozzle 32 further defines a nozzle passage 33 in communication with-one-way valve 30. Discharge nozzle 32 further includes a frustoconical flexible seal 31 which extends outwardly covering vent apertures 25.

The operation and structure of discharge nozzle 32 together with nozzle cap 23 and valve neck 22 is better seen in the enlarged section view set forth below in FIG. 4. However, suffice it to note here that, during typical use of squeeze bottle 10, nozzle cap 23 is removed and squeeze bottle 10 is inclined downwardly toward the surface upon which the flowable material is to be deposited. Thereafter, a quantity of flowable material within interior 16 of bottle 11 is discharged through discharge nozzle 32 by squeezing bottle 11. The squeezing action against bottle 11 contracts the volume of interior 16 forcing a flow of material outwardly through nozzle passage 33 and opening one-way valve 30. Material then flows to the host surface forming a material bead or bolus thereon. Once the desired quantity of flowable material has been discharged through one-way valve 30 of discharge nozzle 32, a release of the force upon bottle 11 allows the bottle to return to its original shape forming a partial vacuum therein. In the absence of discharge pressure, valve 30 returns to its closed configuration and material flow ceases. The partial vacuum formed within interior 16 exerts a force against flexible seal 31 causing air flow from the exterior of squeeze bottle 10 through vent apertures 25 into interior 16 allowing interior 16 to return to normal atmospheric pressure. In accordance with an important aspect of the present invention, the venting of the vacuum within interior 16 through vent apertures 25 as flexible seal 31 is pulled away from covering vent apertures 25 prevents the creation of a suction force within nozzle passage 33 that would otherwise draw material back into interior 16. In addition to the venting action of vent apertures 25 and flexible seal 31, the one-way characteristic of valve 30 further prevents material flow back through discharge nozzle 32. As a result, reverse suction of material and contamination of the remaining material within interior 16 is prevented.

FIG. 4 sets forth as enlarged section view of discharge nozzle assembly 20 showing one-way valve 30 secured within nozzle cap 23. As described above, discharge nozzle assembly 20 includes an assembly cap 21 which defines a plurality of threads utilized in securing discharge nozzle assembly 20 the filler neck of a squeeze bottle. As is also described above, assembly cap 21 further supports a generally cylindrical valve neck 22 which, in turn, supports a generally cylindrical neck extension 27. Valve neck 22 defines a planar surface 29 having a plurality of vent apertures 25 together with a center aperture 24 formed therein. Neck extension 27 also defines an outwardly extending rib 28.

Discharge nozzle 32 includes a one-way valve 30 at one end thereof and a frustoconical flexible seal 31 at the opposite and thereof. Discharge nozzle 32 further defines a nozzle passage 33 extending through flexible seal 31 and one-way valve 30. A rib 34 extends outwardly from the body of discharge nozzle 32. The soft silicone material from which discharge nozzle 32 is fabricated allows discharge nozzle 32 to fit tightly within center discharge aperture 24 of valve neck 22. Rib 34 of discharge nozzle 32 extends beyond center aperture 24. Accordingly, the cooperation between the soft material of discharge nozzle 32 together with rib 34 and flexible seal 31 cooperate to secure discharge nozzle 32 within center discharge aperture 24.

Nozzle cap 23 defines a cylindrical receptacle 35 within which a groove 36 is formed. Nozzle cap 23 further defines a nozzle seat 26 which forms a tapered seat configured to receive and enclose valve 30 of discharge nozzle 32. Nozzle cap 23 is secured to valve neck 22 by the insertion of neck extension 27 into receptacle 35. Rib 28 of neck extension 27 is received within and engages groove 36 formed within nozzle cap 23. The cooperation of rib 28 and groove 36 secures nozzle cap 23 against planar surface 29 of valve neck 22 in a snap fit removable attachment. With nozzle cap 23 secured upon neck extension 27, valve 30 is tightly received within nozzle seat 26 providing a secure closure of one-way valve 30 during periods of non-use.

FIG. 5 sets forth a section view of nozzle assembly 20 showing nozzle cap 23 removed from neck extension 27. As described above, assembly cap 21 defines a plurality of internal threads of conventional fabrication and valve neck 22. Valve neck 22 defines a planar surface 29 having a plurality of vent apertures 25 and a center aperture 24 defined therein. As is also described above, a neck extension 27 extends from planar surface 29 and defines an external rib 28. Discharge nozzle 32 includes a one-way valve 30, an extending rib 34, a flexible seal 31 and a nozzle passage 33 formed therein. Nozzle cap 23 includes a receptacle 35 receiving neck extension 27 and a nozzle seat 26. The latter receives valve 30 when nozzle cap 23 is secured upon neck extension 27.

In the configuration shown in FIG. 5, nozzle cap 23 is removed from the closed configuration set forth above in FIG. 4. As a result, one-way valve 30 of discharge nozzle 32 is no longer secured within nozzle seat 26. This allows one-way valve 30 of discharge nozzle 32 to assume its normal relaxed shape. Thus, with nozzle cap 23 removed, the squeeze bottle is configured for use in the above described manner.

FIG. 6 sets forth an enlarged section view of discharge nozzle assembly 20 taken along section lines 6-6 in FIG. 2 showing the one-way valve 30 secured within nozzle cap 23. With concurrent reference to FIGS. 4 and 6, it will be noted that FIG. 6 shows nozzle assembly 20 rotated ninety degrees from the position shown in FIG. 4. In all other respects, FIGS. 4 and 6 are substantially identical. Accordingly, returning to FIG. 6 and as described above, discharge nozzle assembly 20 includes an assembly cap 21 which defines a plurality of threads utilized in securing discharge nozzle assembly 20 to the filler neck of a squeeze bottle. Assembly cap 21 further supports a generally cylindrical valve neck 22 which, in turn, supports generally cylindrical neck extension 27. Valve neck 22 defines planar surface 29 having vent apertures 25 together with a center aperture 24 formed therein. Neck extension 27 also defines an outwardly extending rib 28.

Discharge nozzle 32 includes one-way valve 30 at one end thereof and flexible seal 31 at the opposite end thereof. Discharge nozzle 32 further defines nozzle passage 33 extending through flexible seal 31 and one-way valve 30. Rib 34 extends outwardly from the body of discharge nozzle 32.

Nozzle cap 23 defines cylindrical receptacle 35 within which groove 36 is formed. Nozzle cap 23 further defines nozzle seat 26 which forms a tapered seat configured to receive and enclose one-way valve 30 of discharge nozzle 32.

FIG. 7 sets forth the section view of FIG. 6 showing nozzle cap 23 removed from neck extension 27. As described above, assembly cap 21 defines a plurality of internal threads of conventional fabrication together with valve neck 22. Valve neck 22 defines planar surface 29 having vent apertures 25 and center aperture 24 defined therein. As is also described above, neck extension 27 extends from planar surface 29 and defines external rib 28. Discharge nozzle 32 includes one-way valve 30, extending rib 34, flexible seal 31 and nozzle passage 33 formed therein. Nozzle cap 23 includes receptacle 35 receiving neck extension 27 and nozzle seat 26. The latter receives one-way valve 30 when nozzle cap 23 is secured upon neck extension 27.

In the configuration shown in FIG. 7, nozzle cap 23 is removed from the closed configuration set forth above in FIG. 6. As a result, one-way valve 30 of discharge nozzle 32 is no longer secured within nozzle seat 26. This allows one-way valve 30 of discharge nozzle 32 to assume its normal relaxed shape. Thus, with nozzle cap 23 removed, the squeeze bottle is configured for use in the above described manner.

FIG. 8 sets forth a sectioned assembly view of discharge nozzle assembly 20. It will be noted that discharge nozzle assembly 20 is comprised of three components which are assembly cap 21, discharge nozzle 32 and nozzle cap 23. Assembly cap 21 is preferably formed as a single molded component fabricated of a suitable medically approved plastic or the like. Assembly cap 21 supports a valve neck 22 having a planar surface 29. Surface 29 defines a center aperture 24 and a plurality of vent apertures 25. In order to provide attachment to a cooperating bottle, assembly cap 21 defines a plurality of internal threads. However, as mentioned above, different attachment means may be utilized for securing assembly cap 21 to a squeeze bottle. Discharge nozzle 32 is preferably formed of a flexible soft material such as silicone or the like. Discharge nozzle 32 includes a one-way valve 30 together with a flexible seal 31, a nozzle passage 33 is formed within discharge nozzle 32 and an outwardly extending rib 34 is formed on the body of discharge nozzle 32. One-way valve 30 is preferably fabricated in a construction known in the art as a duckbill valve. However, it will be recognized by those skilled in the art that alternative valve structures may be utilized without departing from the spirit and scope of the present invention. Nozzle cap 23 defines an interior receptacle 35 which receives neck 27 and rib 28 of assembly 21. Nozzle cap 23 further defines a nozzle seat 26.

The assembly of discharge nozzle assembly 20 is carried forward by initially moving discharge nozzle 32 into assembly cap 21 in the direction indicated by arrow 39. One-way valve 30 is aligned with aperture 24 after which one-way valve 30 is gripped and used to draw discharge nozzle 32 through aperture 24 until rib 34 passes through aperture 24 and beyond. Discharge nozzle 32 assumes the position shown above in FIG. 4. The soft resilient material of discharge nozzle 32 facilitates this assembly operation. Once discharge nozzle 32 has been assembled within center aperture 24, the assembly of discharge nozzle assembly 20 is complete. It will be noted that in addition to facilitating the above scribed assembly of discharge nozzle 32, the soft flexible material from which discharge nozzle 32 is formed also ensures that the, use of nozzle assembly 20 in depositing flowable material upon a sensitive surface such as an ultrasound head will not scratch the sensitive material thereof.

FIGS. 9, 10 and 11 set forth respective side, end and section views of an alternate embodiment of the present invention squeeze bottle, generally referenced by numeral 40. Squeeze bottle 40 differs from squeeze bottle 10 set forth above in FIGS. 1, 2 and 3, solely in the apparatus used to secure the assembly cap, which supports the discharge nozzle assembly, upon the host squeeze bottle. In all other respects, squeeze bottle 40 set forth in FIGS. 9, 10 and 11 is identical in fabrication and operation to squeeze bottle 10 shown in FIGS. 1, 2 and 3. Accordingly, it will be understood that the descriptions and illustrations set forth above in the embodiment of FIGS. 1, 2 and 3 apply with equal force and description to the embodiment set forth in FIGS. 9, 10 and 11 apart from the attachment of the assembly cap.

Thus, FIG. 9 sets forth a side elevation view of, a squeeze bottle constructed in accordance with the present invention and generally referenced by numeral 40. As mentioned above, squeeze bottle 40 is substantially identical to squeeze bottle 10 set forth above in FIG. 1. Squeeze bottle 40 supports an assembly cap 43 which is substantially identical to assembly cap 21 seen in FIG. 1 with the exception of the attachment mechanism used to secure assembly cap 43 to filler neck 45 of squeeze bottle 41. FIG. 10 shows an end view of squeeze bottle 40. FIG. 11 sets forth a section, view of squeeze bottle 40 taken along section lines 11-11 in FIG. 10. It will be noted that assembly cap 43 defines a groove 44. Correspondingly, filler neck 45 of squeeze bottle 40 defines a snap attachment rib 46. Snap attachment rib 46 extends into groove 44 in a snap fit attachment to secure assembly cap 43 to filler neck 45.

FIGS. 12, 13 and 14 set forth respective side, end and section views of a further alternate embodiment of the present invention squeeze bottle, generally referenced by numeral 50. Squeeze bottle 50 differs from squeeze bottle 10 set forth above in FIGS. 1, 2 and 3, solely in the use a valve neck 52 used to support the discharge nozzle assembly, upon the host squeeze bottle. In all other respects, squeeze bottle 50 set forth in FIGS. 12, 13 and 14 is identical in fabrication and operation to squeeze bottle 10 shown in FIGS. 1, 2 and 3. Accordingly, it will be understood that the descriptions and illustrations set forth above in the embodiment of FIGS. 1, 2 and 3 apply with equal force and description to the embodiment set forth in FIGS. 12, 13 and 14 apart from the attachment of the nozzle assembly.

Thus, FIG. 12 sets forth a side elevation view of a squeeze bottle constructed in accordance with the present invention and generally referenced by numeral 50. As mentioned above, squeeze bottle 50 is substantially identical to squeeze bottle 10 set forth above in FIG. 1. Squeeze bottle 50 includes an integrally formed valve neck 52 which is substantially identical to valve neck 22 seen in FIG. 1 and which supports discharge nozzle assembly 53. The advantage of the use of an integrally molded squeeze bottle 51 and valve neck 52 include reduced costs of fabrication and filling. FIG. 13 shows an end view of squeeze bottle 50. FIG. 14 sets forth a section view of squeeze bottle 50 taken along section lines 14-14 in FIG. 13.

FIG. 15 sets forth a perspective view of discharge nozzle 32. As described above, discharge nozzle 32 is preferably formed of a soft silicone material, or the like, which easily deforms and is sufficiently resilient to return to its natural shape. As is also described above, discharge nozzle 32 includes a one-way valve 30, which in the embodiment show, is a duckbill valve. However, it will be apparent to those skilled in the art that other types of one-way valves may be utilized without departing from the spirit and scope of the present invention. Discharge nozzle 32 further includes a rib 34 and a flexible seal 31.

FIG. 16 sets forth a perspective view of a further alternate embodiment of the present invention reverse suction inhibiting squeeze bottle discharge nozzle supported upon a flexible deformable body such as a conventional container known in the art as a “toothpaste tube”. Such containers are well known and are typically formed of a resilient or deformable material such as plastic or the like. More specifically, FIG. 16 shows discharge nozzle 32 supporting one way valve 30 upon an assembly cap 60. It will be understood that one way valve 30 and discharge nozzle 32 are fabricated in the same manner as set forth and described above. Assembly cap 60 is preferably formed of a molded plastic material, or the like, and supports discharge nozzle 32 and one way valve 30. Assembly cap 60 further defines a rib 64 which accommodates a closure cap such as nozzle cap 23 shown in FIG. 6. Assembly cap 60 further includes a seam 63 which joins the lower edge of assembly cap 60 to the upper edge of flexible body 61. Flexible body 61 further defines a body closure 62 at the lower end thereof.

In operation, flexible body 61 is squeeze or otherwise deformed to force a quantity of the viscous material therein outwardly through assembly cap 60 and one way valve 30 of discharge nozzle 32. As described above, the one way operation of valve 30 provides a characteristic whereby material is able to flow outwardly through discharge nozzle 32 but is unable to be suctioned back through valve 30 when the pressurizing or deforming force that has been applied to flexible body 61 is removed. This one way characteristic inhibits the suctioning of material and air back through discharge nozzle 32 described above. As is also described above and with temporary reference to FIG. 6, return air is allowed to pass through vent apertures formed in the assembly cap through the action of seal 31 thereby avoiding reverse suctioning of material. Returning to FIG. 16, flexible body 61 may be fabricated of a somewhat resilient plastic material which tends to “spring back” to its original shape when pressure is released. Alternatively, without departing from the spirit and scope of the present invention, flexible body 61 may be deformable and have little in the way of such resilient restoring characteristic. In either event, flexible body 61 benefits from the reverse suction inhibiting characteristic provided by discharge nozzle 32 and one way valve 30.

FIG. 17 shows a sectioned assembly view of a further alternate embodiment of the present invention reverse suction inhibiting squeeze bottle discharge nozzle assembly generally referenced by numeral 70. By way of overview, discharge nozzle assembly 70 is substantially identical to discharge nozzle assembly 20 set forth in FIG. 6 with the primary difference being found in the structure by which return air is allowed to vent into the squeeze bottle interior when the squeeze bottle is released following a discharge of viscous material. In the embodiment set forth in FIG. 6 discharge nozzle assembly 20 returns air through a plurality of vent apertures 25 formed in planar surface 29 of assembly cap 21. In contrast, in the embodiment shown in FIG. 17, return air is vented into the squeeze bottle interior through a separate vent valve 90 supported within a vent aperture 75 formed in the sidewall of valve neck 72. Apart from this difference, discharge nozzle assembly 70 is fabricated and operative in substantially the same manner as discharge nozzle assembly 20, shown in FIG. 6.

More specifically, discharge nozzle assembly 70 includes an assembly cap 71 having an extending valve neck 72 which terminates in a generally planar surface 79. Surface 79 defines a center aperture 74 and further supports a neck extension 77. Neck extension 77 further supports an outwardly extending rib 78. Valve neck 72 further defines a vent apertures 75. A plurality of threads are formed within assembly cap 71 to facilitate attachment of assembly cap 71 to a conventional squeeze bottle (not shown). Discharge nozzle assembly 70 further includes a discharge nozzle 82 preferably formed of a soft flexible resilient material having a one way valve 80 formed there in. As described above one way valve 80 may comprise virtually any one way valve structure such as a conventional “duck bill” valve or the like. Discharge nozzle 82 further supports a rib 84 and a resilient seal 81. A nozzle passage 83 extends through discharge nozzle 82 and one way valve 80. Discharge nozzle assembly 70 further includes a vent valve 90 fabricated of a soft flexible resilient material and similar in structure to discharge nozzle 82. Thus then to valve 90 includes a one-way valve 92 and a flexible seal 91. Vent valve 90 further includes a rib 94 and a nozzle passage 93 formed therein.

Discharge valve 82 is assembled to assembly cap 71 by initially passing one way valve 80 through center aperture 74. Thereafter the remainder of one way valve 80 and rib 84 is drawn through center aperture 74 bringing seal 81 against the undersurface surrounding center aperture 74. In a similar fashion vent valve 90 is assembled to valve neck 72 by passing one way valve 92 through vent apertures 75 and thereafter drawing the remainder of vent valve 90 through aperture 75 passing rib 94 through vent apertures 75 and bringing seal 91 against the outer surface surrounding vent apertures 75.

FIG. 18 sets forth a section view of discharge nozzle assembly 70 in a fully assembled configuration in which discharge nozzle 82 and vent valve 90 are assembled to assembly cap 71. Following the above described assembly the flexible soft resilient character of the material from which discharge nozzle 82 and vent valve 90 are formed maintains the attachment and seal to assembly cap 71.

More specifically, and as is described above, discharge nozzle assembly 70 includes an assembly cap 71 having an extending valve neck 72 which terminates in a generally planar surface 79. Surface 79 defines a center aperture 74 and further supports a neck extension 77. Neck extension 77 further supports an outwardly extending rib 78. Valve neck 72 further defines a vent apertures 75. A plurality of threads are formed within assembly cap 71 to facilitate attachment of assembly cap 71 to a conventional squeeze bottle (not shown). Discharge nozzle assembly 70 further includes a discharge nozzle 82 preferably formed of a soft flexible resilient material having a one way valve 80 formed there in. As described above one way valve 80 may comprise virtually any one way valve structure as a conventional “duck bill” valve or the like. Discharge nozzle 82 further supports a rib 84 and a resilient seal 81. A nozzle passage 83 extends through discharge nozzle 82 and one ways valve 80. Discharge nozzle assembly 70 further eludes a vent valve 90 fabricated of a soft flexible resilient material and similar in structure discharge nozzle 82. Thus then to valve 90 includes a one-way valve 92 and a flexible seal 91. Vent valve 90 further includes a rib 94 and a nozzle passage 93 formed therein.

In operation, in the absence of squeeze pressure applied to the squeeze bottle (not shown) to which discharge nozzle assembly 70 is secured, discharge nozzle 82 and vent valve 90 assume a normally closed configuration. When the user applies a squeeze force to the squeeze bottle, the viscous material therein is forced into assembly cap 71 and exerts an outward pressure against vent valve 90 and discharge nozzle 82. The viscous material forced into nozzle passage 83 of discharge nozzle 82 produces a force in the direction indicated by arrow 95 which opens one way valve 80 allowing material to be discharged outwardly through one way valve 80. Conversely, the force of viscous material pressure against vent valve 90 in the direction indicated by arrow 96 is opposed by the one way structure of vent valve 90 and one way valve 92 thereof is forced into closure. The closure of one ways valve 92 of vent valve 90 prevents material flow outwardly through vent valve 90. The discharge flow through discharge nozzle 82 continues as the user continues to apply a squeeze pressure to the squeeze bottle.

Once the user releases the squeeze pressure applied to the squeeze bottle, the resilient character of the squeeze bottle described above produces a section force which attempts to draw air back into the interior of the squeeze bottle. This suction force attempts to draw discharge viscous material back through discharge nozzle 82 in the direction indicated by arrow 97. The operation of one way valve 80 prevents material flow in the direction indicated by arrow 97 and discharge nozzle 82 remains closed. Conversely, the suction force created within assembly cap 71 draws air through vent valve 90 in the direction indicated by arrow 98. This direction of airflow opens one way valve 92 allowing vent air to pass through vent passage 93 of vent valve 90 thereby relieving the suction within assembly cap 71 and the squeeze bottle (not shown to which it is secured. Thus the suction force which might otherwise draw potentially contaminated material hack through the discharge nozzle and into the container interior is prevented from flowing by the one-way character of the discharge nozzle and the venting provided by vent valve 90 supported within neck 72.

FIG. 19 sets forth a partial section view of a still further alternate embodiment of the present invention utilizing a squeeze bottle 100 having an upper portion constructed as set forth above in FIG. 3 or alternatively as set forth above in FIGS. 17 and 18. The essential difference and squeeze bottle 100 from the above described embodiments is the utilization of a bottom surface which facilitates and supports an air vent valve 105 in combination with a concave bottom surface 101. Thus, squeeze bottle 100 defines a concave bottom surface 101 supporting an air vent valve 105 near the center high point thereof. Concave surface 101 forms and edge 102 which facilitates resting squeeze bottle 100 upright upon a flat surface notwithstanding the presence of vent valve 105. Vent valve 105 is operative to prevent the flow of material outwardly in the direction indicated by arrow 106 and to facilitate vent air traveling inwardly in the direction indicated by arrow 107. In this manner when squeeze bottle 100 is squeezed, the force provided by the flowable material within the squeeze bottle closes vent valve 105 and material flow is prevented. Conversely, when squeeze bottle 100 is released and the above described suction condition is created within squeeze bottle 100, vent valve 105 opens and allows vent air to pass through vent valve 105 in the direction indicated by arrow 107 thereby relieving the suction force within squeeze bottle 100.

What has been shown is a reverse suction inhibiting squeeze bottle discharge nozzle secured to the filler neck of an otherwise conventional squeeze bottle. The reverse suction inhibiting squeeze bottle discharge nozzle shown provides a valve operative within the discharge passage of the nozzle together with an air return venting system and apparatus that cooperates with the valve to provide a vented air flow return into the bottle interior thereby restoring atmospheric pressure to the bottle interior. The venting action provided by the air return venting system and the closure of the valve occur solely when the deformed squeeze bottle is released. As a result, the reverse suctioning of potentially contaminated material discharge back into the squeeze bottle interior is prevented.

While particular embodiments of the invention have been shown and described, it will be obvious to those skilled in the art that changes and modifications may be made without departing from the invention in its broader aspects. Therefore, the aim in the appended claims is to cover all such changes and modifications as fall within the true spirit and scope of the invention. 

That which is claimed is:
 1. A reverse suction inhibiting squeeze bottle discharge nozzle for use in combination with a squeeze bottle, said squeeze bottle discharge nozzle comprising; an assembly cap, securable to a squeeze bottle in communication with flowable material therein, said assembly cap defining and extending valve neck defining a sidewall, a discharge aperture and a vent aperture; a one way discharge valve supported within said discharge aperture operative to permit material flow outwardly from said assembly cap and to prevent material flow inwardly to said assembly cap; and a vent valve operative to permit air flow into said assembly cap through said vent aperture and to prevent airflow outwardly from said assembly cap through said vent aperture, said discharge valve and said vent valve cooperating to allow flowable material within said assembly cap to be forced outwardly through said discharge valve and to vent air into said assembly cap and to prevent a suction force within said assembly cap from drawing discharged flowable material back into said assembly cap.
 2. The reverse suction inhibiting squeeze bottle discharge nozzle forth in claim 1 wherein said assembly cap defines a planar surface and wherein said discharge aperture is defined in said planar surface.
 3. The reverse suction inhibiting squeeze bottle discharge nozzle set forth claim 2 wherein said one way discharge valve includes; an elongated discharge nozzle having a one way valve formed at a first end thereof, said one way valve extending through said discharge aperture beyond said planar surface; flexible seal formed at a second end of said discharge nozzle extending outwardly there from within said assembly cap beyond said discharge aperture on the underside of said planar surface.
 4. The reverse suction inhibiting squeeze bottle discharge nozzle set forth in claim 3 wherein said planar surface defines a vent aperture proximate to said discharge aperture, said flexible seal covering said vent aperture and flexing between a first position sealing said vent aperture and a second position displaced from said vent aperture.
 5. The reverses suction inhibiting squeeze bottle discharge nozzle set forth in claim 4 wherein said one way discharge valve including said elongated discharge nozzle, said one way valve and said flexible seal are formed of a single integral unit.
 6. The reverse suction inhibiting squeeze bottle discharge nozzle set forth in claim 5 wherein said flexible seal, said discharge nozzle and said one way valve define a continuous nozzle passage therethrough and wherein the flow of flowable material through said nozzle passage is permitted to flow outwardly by said one way valve but prevented from flowing inwardly through said one way valve.
 7. The reverse suction inhibiting squeeze bottle discharge nozzle set forth in claim 1 wherein said assembly cap defines a planar surface and wherein said discharge aperture is defined in said planar surface and wherein said vent aperture is formed in said sidewall of said valve neck.
 8. The reverse suction inhibiting squeeze bottle discharge nozzle set forth in claim 7 wherein said vent valve is received within said vent aperture and defines an extending seal, a one way valve and a vent passage therethrough, said vent valve being secured within said vent aperture such that said seal is outside said valve neck and said one way valve extends inwardly through said vent aperture into said valve neck whereby air is able to pass into said valve neck by flowable material and air are prevented from passing outwardly from said valve neck through said vent valve.
 9. The reverse suction inhibiting squeeze bottle discharge nozzle set forth in claim 8 wherein said one way discharge valve includes; an elongated discharge nozzle having a one way valve formed at a first end thereof, said one way valve extending through said discharge aperture beyond said planar surface; a flexible seal formed at a second end of said discharge nozzle extending outwardly there from within said assembly cap beyond said discharge aperture on the underside of said planar surface.
 10. The reverse suction inhibiting squeeze bottle discharge nozzle set forth in claim 1 wherein said assembly cap includes a plurality of attachment threads for securing said assembly cap to a cooperating threaded attachment on a squeeze bottle.
 11. The reverse suction inhibiting squeeze bottle discharge nozzle set forth in claim 1 wherein said assembly cap includes a molded attachment for securing said assembly cap to a cooperating molded attachment on a molded squeeze bottle.
 12. A reverse suction inhibiting squeeze bottle discharge nozzle, said squeeze bottle discharge nozzle comprising: a squeeze bottle formed of a resilient material defining a closed interior volume and an open neck; a quantity of flowable material received within said interior volume; an assembly cap, secured to said squeeze bottle in communication with said closed interior volume and said flowable material therein, said assembly cap defining a discharge aperture and a vent aperture; a one way discharge valve supported within said discharge aperture operative to permit material flow outwardly from said assembly cap and to prevent material flow inwardly to said assembly cap; and a vent valve operative to permit air flow into said assembly cap and said closed interior volume through said vent aperture and to prevent airflow and flowable material flow outwardly from said assembly cap through said vent aperture, said discharge valve and said vent valve cooperating to allow flowable material within said closed interior volume and said assembly cap to be forced outwardly through said discharge valve and to prevent a suction force within said closed interior volume and said assembly cap from drawing discharged flowable material back into said assembly cap.
 13. A reverse suction inhibiting squeeze bottle discharge nozzle, said squeeze bottle discharge nozzle comprising: a squeeze bottle formed of a resilient material defining a closed interior volume, a bottom having a vent aperture formed therein and an open neck; a quantity of flowable material received within said interior volume; an assembly cap, secured to said squeeze bottle open neck in communication with said closed interior volume and said flowable material therein, said assembly cap defining a discharge aperture; a one way discharge valve supported within said discharge aperture operative to permit material flow outwardly from said assembly cap and to prevent material flow inwardly to said assembly cap; and a vent valve supported within said vent aperture operative to permit air flow into said assembly cap and said closed interior volume through said vent valve and to prevent airflow and flowable material flow outwardly from said assembly cap through said vent valve, said discharge valve and said vent valve cooperating to allow flowable material within said closed interior volume and said assembly cap to be forced outwardly through said discharge valve and to prevent a suction force within said closed interior volume and said assembly cap from drawing discharged flowable material back into said assembly cap.
 14. The reverse suction inhibiting squeeze bottle discharge nozzle set forth in claim 13 wherein said squeeze bottle bottom defines a concave surface surrounding said vent aperture allowing said squeeze bottle to rest upright when said vent valve is within said vent aperture. 